[T3] On my 73 square

[William Jahn]

 I have no idea what the problem is with the air temp plugged in. I drove
it after changing the head temp sensor and it only changed the idle speed a
bit.
 If as you said both my temp sensors seem to read what is close to normal
and I can't find any issues with the wiring yet if the air temp has an
issue I may not see it with my meter where does this leave me?

 Is it possible the ECU has some issue reading the air temp sensor? So far
everything else as far as the ECU functions as it should. I did have to
have it jump started twice , once off another car and once off one of those
portable jump starters yet it was because my battery was dead and still in
place and the voltage from the jump was not more than what a good battery
would supply. I don't recall it running worse after that.

 I do realize without seeing my car to experience what I do it's next to
impossible to diagnose. I only have 36,000 miles on it since I rebuilt it
so I doubt engine wear is causing this issue. I can live with the air temp
out of the picture after all I have for almost 11 years. The main thing is
it should work with it and I can't find one reason why it does not. It
could be a faulty air temp sensor yet I can't seem to find another one to
even see if that's the case.

 I will check the voltage at the ECU from the power relay , to be honest
after I fixed the relay plugging in the air temp it seems to run even worse
and the same with it unplugged. I don't have a problem spending the extra
time checking wires with a DVOM.

On Fri, Sep 13, 2019 at 11:48 AM Jim Adney <jadney at vwtype3.org> wrote:

> On 13 Sep 2019 at 10:04, William Jahn wrote:
>
> >  What is the center conductor ?
>
> That's the copper strands in the middle. It's the only conductor in the
> wire,
> but the body and crimp form an outside conductor.
>
> > I only see a thin red wire when all the black  plastic covering is
> removed
>
> It's red on some, black on some. I think black was the original version,
> but it
> makes no functional difference.
>
> > In another post you said there is a spring on each end of the
> > thermister / small puck was your term.
>
> Probably more like a spring on one end and pushed against the body on the
> other end.
>
> > My point is is I were to short the lead anywhere from the connector to
> > the crimp to ground then this is a short to ground . You said from the
> > connector to the crimp should read say 1.8K ohm .
>
> Yes, this was in response to your post that said that you measured an open
> circuit between the connector and the crimp.
>
> > Or is the puck or thermistor in contact with the crimp at one end via a
> > small spring and also contacts the body via a spring at the other end?
>
> Yes, wire to small spring, to thermistor puck, to body. IIRC, the
> thermistor is
> a small cylinder, maybe 3/16" dia and 3/16" long.
>
> >  I already tightened all the injector connectors and all the other ones
> the
> > TPS and MPS and trigger points. None of this made any difference.
>
> Okay, good.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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